Elevator safety appliance



April 21, 192s.' A ik 1,534,291

D. A. MaCASKILL ELEvAToR SAFETY APPLIANGE Filed aan. 9. 1924 l 2sheets-sheet 1 'April 21 1925' l I 1,534,291

D. A. Ma =AsK|LL- I ELnvAToR 'SAFETY APPLIANCB Filed Jan. e. 1924Y l u 2sheets-sheet 2 v BY ' ATTORNEYS Patented Apr. 2l, 1925.

UNIT-En s'rarrs.f PATENT orner.

DANIEL ARIES MACASKILL, OFA BROOKLYN, YORK, ASSIGNQB, 0F ONE-HALF' TOLAWRENCE CU'NllIlN'GI-IA1MPs OF BROOKLYN, NEXV YORK.

nrgnvnfron SAFETY ArrLIANoE.

Application filed January 9, 1924. Serial No. 685,227.,

My invention may be, used in assocnitionl ivitliany type of elevatorcar-safety device with means, to grip or clutch thev elevator car safetycontrol cable, whereby a pull' is exerted upon the elevator car safetycontrol cable to bring the elevator car safety into operation.

The' general object of my invention isto provide a, manually controlledmeansoperable 'from an elevator cantor bringing the elevator car safetycontrol cable gripping means into action, independently ot the automaticcontrolled devices, to bringtlie elevator car safety into operation.. l

Reference, is to behadl to the accompanying drawings` 'forming a part ofthis specification, it being understood that' the drawings are merelyillustrative olf'exainples of the invention. v

Figure 1 is a diagrammatic ViewY ot an elevator Well and car togetherwith the. automatic governor for the safety control cable of theelevator carand of manually operable safety device and the controllingcircuit thereof;

Figure 2 is an enlarged elevation of an example of my improved safetydevice showing the same installed in connection with one of thelxnoivn'types ot automatically controlled cable gripping means;

lligure 3 is. a view similar to Figure 2 but illustrating anotherinstallation of my invention in association with one type ot an elevatorcar safety control cable gripping device.

Figure 4. is a plan View of the devices shown in Figure 3, (parts, beingbroken away. e

ln the example of my invention show-n in Figures 1 and 2 the letter a,represents a portion ot the iframe or Well ot'y the elevator; b, theelevator car; c, the cable controlling the car safety means, usuallyreferred toin thetrade as the` safety, d, the Wheel. over which, saidcable runs; e., the shaft of said Wlieel geared as usual tov the spindlef of a centrifugal governor g, the lever or arm IL oit which connects bya depending lift meine ber e' "ith" the grip, for gripping thcable oAagainst ther lined member 7o. The, invention is shown in associationwith a type. of elevator safety devices in which an` endless safety.control cable o runs about4 they goveiner sheavel (l and about aWeighted Slieav'e Z inthe elevator well at: the bottmn. The safetyControl'. cableof the ypereerrcd: t0

hasanfanniliary cable m .sccuredto a branch` n.: of the usnalcoupling 0uniting the ends ot?V the cable c. Said-y cable m in practice eX- tendsto a drinn p and serves to operate a dog or other elevator safety clutchdevice for arresting the elevator car b, said devices being known; Thenthe cable o is held by the grip under operation of the governor g, apull is exerted on said; cable andl the pull y beingl communicated tothe auxiliary: cable m throws into action the usual dog or other Pimproved elevator car safety controlled by the drum p.

ln accordance with my invention I pro vide a pivoted gripping element 10here shown as pivotedv toupst'anding lugs; 11 onV a lifted frame member12. The pivot shaft l3- ofy the grip 10 is here shown as provided withan arm 14 having a counter-balance Weight 15. The element 10, is adaptedto grip the cable c between the said element and the fixed member 16 onframe. member 12. n

The coil 17 of a solenoid 18 isl in an electric circuit 19 having apushbutton 20 for manually closing thecircnit.l The core 21 ofthesolenoid 18 'when the circuit isA closed and said coil energized isadapted to enand rocl alever 29 here shown as pivoted on a bracket 23 onsolenoid 18. rllhe lever 22 connects by alink 24 with aL lever liOV core21 thereo' to roel; the lever 22. Said lever 22 lies at one end in closerelation to the arm 14 of grip clement 10 so that in the raising ot thelever 22 by the solenoid the arm lll and gripping element 10 will berocked and the weighted arm will carry he gripping element to the dottedline position shown in Figure 2 tor ellectively gripping the cable cagainst member 1G. At the same time the connection of the lever 22tlirougl linlr 24 with the lever 25 will cause the automaticallycontrolled grip element to also be thrown into action for gripping thecable c and thus arresting the descent ol' the car independently of theaction ot the automatic centrifugal governor y. l thus provide meanswhereby the elevator operator or other person in or on the elevator` carcan arrest the descent of the car inde pendcntly ot the action of thegovernor controlled safety means, through the medium of the pushbuttonor equivalent circuit controller with which the car is equipped.

The foregoing describes the installation ot'my improved safety appliancein situations where the governor and automatic safety appliances arealready installed. ln Figures 3 and d l have illustrated a constructionand arrangement ot the parts suitable for situations where no governoror governor controlled safety grip is already installed, the assemblageof Figures 3 and Ll showing?. single grip, a governor to automaticallythrow the grip into action, and a manually controlled means for throwingthe grip into action. The gripping element coacts with the lined member116 on the frame a to grip the safety control cable C, said cablerunning over a sheave D, shaft E of which is geared to the spindle F ofthe governor G. Governor G operates a lever .l-ll to actuate li'litdevice l to automatically throw the gripping element 11() into action.As in the first described construction a solenoid 117 is employed, thecore 121 ot which is adapted to actuate a lever 122, said lever 122bearing against the arm 114i on the shalt 113 of grip element 110, saidarm having a weight as in the first-described construction. When thesafety control cable C travels beyond a predetermined speed by reasonotl undue speed ot the elevator car, the governor G will through thelitt member l throw the gripping element 110 into action. l/Vhen thecircuit 119 ot the solenoid 117 is closed at the pushbntton 2O by aperson in or on the car Z), the lever 122 will be rocked and will rockthe arm 114 and throw gripping element 110 into action. rlfhe lever 225is connected with lever 122 by a link 224A and turnbuclrle 32% so thatthe lifting element l will also be raised auf the gripping element 110be thrown into action should lever 122 fail Jfrom any cause to directlyoperate said gripping element 110.

l would state in conclusion that while the illustrated examplesconstitute practical embodiments oi my invention, l do not limit myselfstrictly to the exact details herein illustrated, since, manifestly, thesame can be considerably varied without departure from the sairit of theinvention as defined in the appended claims.

Having thus described my invention, l claim:

1. ln a safety appliance l'or elevators, nieansto grip the safetycontrol cable of the elevator car, automatic governing means to bringsaid gripping means into action, and manually controlled means carriedby and operable from the elevator car to op tionally bring saidgrippingmeans into action independently ot the automatic governing means.

2. rfi sa'i'ety appliance for elevators, said appliance comprisinggripping means adapted to grip the safety control cable of the elevator,and manually controlled means carried 1y and operable from the elevatorcar to optionally bring said gripping means into action tor causing apull to be exert-ed on said cable and thereby bring the elcvator carsafety into operation.

8. A safety appliance vlor elevators, comprising gripping meansincluding a movable gripping element to engage the safety control cableoit the elevator car, means to actuate said mo -able gripping` elementto move the same into position to grip the safety control cable ci thecar to bring the elevator car safety into action, and operating meanstor said actuating means, said operating means being carried by and controllable from the elevator car.

Il. Ar safety appliance tor elevators com` prising gripping meansincluding a movable gripping element to engage the safety control cablelot the elevator car, an element adapted to engage the gripping elementto move the same toward gripping position, an electromagnetic device toactuate the second-mentioned element, an electric circuit including saidelectromagnetic device, and manually operable circuit-closing means inthe elevator car, whereby the gripping element` may be optionallybrought into action by one in or on the elevator car.

5. l safety appliance for elevators comising an element adapted to beswung into t pping engagement with the safety control cable oi theelevator car, a lever adaptefl to engage said gripping element to mdvethe same toward gripping position, a solenoid, the core ot which isadapted to engage said lever and cause the same to move the grippingelement, an electric circuit including said solenoid, and manually openable means controllable from the elevator' carl'to close said circuit toenergize the solenoie.

G. A safety appliance for elevators coinprising an element adapted to beswung into gripping engagen'ient yvitli the safety control cable of theelevator car, a. Weighted arm on said gripping element; a lever movableinto engagement with said arm for throwing tl'ic gripping element towardgripping position, means to actuate said'lever and manually controlledmeans carried by and operable from tlic car of the elevator to causeysaid actuating means to rock said lever to optionally bring the grippingelement into action.

7. A safety means for elevators, comprising a gripping element,automatic speed,- controlled means for bringing said gripping elementinto action7 a second gripping element, both of said elements adapted toengage the safety control cable of an elevator car, operating means forthe first-mentioned gripping element, said operating means beingindependent `of said speed controlled means, operating means for thesecond-mentioned gripping element, optionally operable manuallyControlled means to actuate said second-mentioned operating means, andmeans to actuate the inst-mentioned operating means by thesecond-mentioned operating means.

8. A safety/f' appliance for elevators comprising gripping means adaptedto grip the safety control cable of the elevator car, and manuallycontrolled means carried by and operable from the car of the elevator tooptionally bring said gripping means into action.

DANIEL ARIES MACASKILL.

